5515633645 has 4 divisors (see below), whose sum is σ = 6618760380. Its totient is φ = 4412506912.

The previous prime is 5515633639. The next prime is 5515633649. The reversal of 5515633645 is 5463365155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3423303081 + 2092330564 = 58509^2 + 45742^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515633645 - 2⁷ = 5515633517 is a prime.

It is a super-3 number, since 3×5515633645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515633649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551563360 + ... + 551563369.

It is an arithmetic number, because the mean of its divisors is an integer number (1654690095).

Almost surely, 2^5515633645 is an apocalyptic number.

It is an amenable number.

5515633645 is a deficient number, since it is larger than the sum of its proper divisors (1103126735).

5515633645 is a wasteful number, since it uses less digits than its factorization.

5515633645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103126734.

The product of its digits is 810000, while the sum is 43.

The square root of 5515633645 is about 74267.3120895054. The cubic root of 5515633645 is about 1766.8450767768.

The spelling of 5515633645 in words is "five billion, five hundred fifteen million, six hundred thirty-three thousand, six hundred forty-five".